Those kooky people at Valve have done another tie-up to bring another game to Team Fortress 2, and this time it’s the indie sensation Minecraft. This character upgrade is just a little bit more exclusive than the typical TF2 add-on.

Minecraft creator Markus “Notch” Persson has his very own hat, and it’s one of a kind. The ‘Top Notch’ hat, as the item is officially called, is a blocky-looking hat that fully covers the character’s face, replacing it with a likeness of Notch’s Minecraft avatar.

Minecraft is a game based on an open world and the freedom to build structures as one chooses. Not surprisingly, it’s been a hotbed for creative user-generated content. Architectural monuments, classic games, and even marriage proposals have been built in-game. For its open-ended awesomeness, the game has sold millions of copies and made Notch an internet celebrity.

He’s also a passionate TF2 player, according to his own blog. He played the original Quake mod, where Team Fortress started, and then played Valve’s Team Fortress Classic which had a cult following. When The Orange Box, containing TF2, was announced, he jumped on board immediately. Notch plays under his own name in-game, so players can look for the hat to see whether it’s really him or an impostor. (Also, he’s in Sweden, so only keep your eye out if you play on European servers.)

“Hooooly cow. Thank you, Valve,” Notch wrote. He added that wearing the head/hat/thing gets him lots more attention in-game. Teammates scramble to heal him as medics, but enemy spies covet the chance to say “I stabbed Notch” as well.

Team Fortress 2 released in 2007 but went free-to-play in June of this year.